Stabilized iodocarbon compositions
View Patent ↗Disclosed are compositions comprising at least one iodocarbon compound and preferably at least one stabilization agent. These compositions are generally useful as refrigerants for heating and cooling, as blowing agents, as aerosol propellants, as solvent composition, and as fire extinguishing and suppressing agents.
1. A heat transfer composition comprising:
(a) at least one iodocarbon;
(b) at least one refrigerant compound other than said iodocarbon;
(c) a first stabilizing compound selected from the group consisting of dienes having at least four carbon atoms;
(d) a second stabilizing compound selected from the group consisting of:
(1) diene-based compounds having at least two carbon-carbon double bonds and at least four carbon atoms, different from (c);
(2) epoxy compounds selected from compounds according to Formulas (E1) and (E2):
where
R 1 is an aliphatic radical having at least 3 carbon atoms;
R 2 is an aliphatic radical having 4 or 5 carbon atoms or a polycyclic aromatic radical;
(3) phosphites according to formula P1 below:
where each R is independently a phenyl radical or
a carboxylate radical having at least 6 but less than 15 carbon atoms;
(4) unhindered or mildly hindered phenols; and
(5) combinations of any two or more of these,
said stabilizer compound(s) being present in an amount effective to stabilize said at least one iodocarbon against degradation; and
(e) 30 wt % to about 50 wt % of at least one lubricant.
2. The heat transfer composition of claim 1 wherein R 1 comprises at least 4 carbon atoms.
3. The heat transfer composition of claim 1 wherein R 1 is an unsaturated aliphatic radical having from 4 to 6 carbon atoms.
4. The heat transfer composition of claim 1 wherein R 1 is a 4 carbon unsaturated aliphatic radical.
5. The heat transfer composition of claim 1 wherein R 2 is a naphthyl radical.
6. The composition of claim 1 wherein said at least one iodocarbon comprises CF 3 I.
7. The composition of claim 1 wherein said second stabilizing compound is selected from the group consisting of (1) diene-based compounds having at least two carbon-carbon double bonds and at least four carbon atoms, different from (c); (2) epoxy compounds selected from compounds according to Formulas (E1) and (E2):
where
R 1 is an aliphatic radical having at least 3 carbon atoms;
R 2 is an aliphatic radical having 4 or 5 carbon atoms or a polycyclic aromatic radical;
(3) phosphites according to formula P1 below:
where each R is independently a phenyl radical or
a carboxylate radical having at least 6 but less than 15 carbon atoms, and combinations of any two or more of (1) through (3).
8. The composition of claim 1 wherein at least one stabilizing compound is selected from the group consisting of Myrcene, Geraniol, Farnesol, Farnesene, Limonene, Diphenyl Phosphite, 1,2-epoxyhexene, Dilauryl hydrogen phosphite, and combinations of two or more of these.
9. The composition of claim 1 wherein at least one stabilizing compound is selected from the group consisting of Myrcene, Geraniol, Farnesol, Farnesene, Limonene, Diphenyl Phosphite, 1,2-epoxyhexene, Dilauryl hydrogen phosphite, 2,4-dimethyl-6-tert-butylphenol, Tocopherol and combinations of two or more of these.
10. A heat transfer composition comprising:
(a) at least one iodocarbon;
(b) at least one refrigerant compound other than said iodocarbon;
(c) 30 wt % to about 50 wt % of at least one lubricant comprising polyalkyleneglycol (PAG);
(d) a first stabilizing compound selected from the group consisting of dienes; and
(e) a second stabilizing compound selected from the group consisting of diene-based compounds different from (d), epoxides, phosphates, phosphites, and combinations of two or more thereof.
11. The composition of claim 10 wherein said stabilizing compounds are present in the composition in an amount effective to stabilize said at least one iodocarbon against degradation under the conditions of use for said heat transfer composition.
12. The composition of claim 10 wherein said first stabilizing compound comprises butadiene.
13. The composition of claim 10 wherein said first stabilizing compound comprises at least one terpene-based compound.
14. The composition of claim 13 wherein said terpene-based compound is selected from the group consisting of myrcene, geraniol, farnesol, farnesene, limonene, and combinations of two or more thereof.
15. The composition of claim 10 wherein said stabilizing compound comprises an epoxide.
16. The composition of claim 15 wherein said epoxide is selected from the group consisting of 1,2-epoxyhexane, naphthyl glycidyl ether, and combinations of these.
17. The composition of claim 10 where said stabilizing compound comprises a phosphate or phosphite.
18. A heat transfer composition comprising:
(a) at least one iodocarbon;
(b) at least one refrigerant compound other than said iodocarbon;
(c) about 50 wt % to about 71 wt % of at least one lubricant comprising polyalkyleneglycol (PAG);
(d) a first stabilizing compound selected from the group consisting of dienes; and
(e) a second stabilizing compound selected from the group consisting of diene-based compounds different from (d), epoxides, phosphates, phosphites, and combinations of two or more thereof.